428521776 has 20 divisors (see below), whose sum is σ = 1107014712. Its totient is φ = 142840576.

The previous prime is 428521759. The next prime is 428521783. The reversal of 428521776 is 677125824.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4463721 + ... + 4463816.

Almost surely, 2^428521776 is an apocalyptic number.

It is an amenable number.

428521776 is an abundant number, since it is smaller than the sum of its proper divisors (678492936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428521776 is a wasteful number, since it uses less digits than its factorization.

428521776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8927548 (or 8927542 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 428521776 is about 20700.7675220027. The cubic root of 428521776 is about 753.9183235597.

The spelling of 428521776 in words is "four hundred twenty-eight million, five hundred twenty-one thousand, seven hundred seventy-six".